Home / 90,912.81-125,498.39-61,122.09

Finding the Fourth Proportional to 90,912.81, 125,498.39 and 61,122.09

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Solution

The fourth proportional to 90,912.81, 125,498.39 and 61,122.09 is: 84,374.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,912.81 : 125,498.39 = 61,122.09 : x
  2. Step 2: Convert to fraction form
    90,912.81/125,498.39 = 61,122.09/x
  3. Step 3: Cross multiply
    90,912.81x = 125,498.39 × 61,122.09
  4. Step 4: Simplify right side
    90,912.81x = 7,670,723,582.82
  5. Step 5: Solve for x
    x = 7,670,723,582.82/90,912.81
  6. Step 6: Final answer
    x = 84,374.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.